648910117 has 2 divisors, whose sum is σ = 648910118. Its totient is φ = 648910116.

The previous prime is 648910103. The next prime is 648910139. The reversal of 648910117 is 711019846.

648910117 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 626951521 + 21958596 = 25039^2 + 4686^2 .

It is a cyclic number.

It is not a de Polignac number, because 648910117 - 2¹¹ = 648908069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648910147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324455058 + 324455059.

It is an arithmetic number, because the mean of its divisors is an integer number (324455059).

Almost surely, 2^648910117 is an apocalyptic number.

It is an amenable number.

648910117 is a deficient number, since it is larger than the sum of its proper divisors (1).

648910117 is an equidigital number, since it uses as much as digits as its factorization.

648910117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 37.

The square root of 648910117 is about 25473.7142364438. The cubic root of 648910117 is about 865.7546810139.

The spelling of 648910117 in words is "six hundred forty-eight million, nine hundred ten thousand, one hundred seventeen".